Patent US2816477A successfully refreshed from Google Patents.
US2816477A
Expired / Lapsed
US
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Light intensity control with variable louvers for mosaic picture projection apparatus
Assignee: VITARAMA CORP
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Filing: 1952-11-19
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Granted: 1957-12-17
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Expires: 1972-11-19
Abstract
No abstract record available.
Inventors
- 👤 Waller Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:23
CPC Classifications
G; G03; G03B; G03B37/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1520869A
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US1627396A
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US1808352A
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US2278142A
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US2610544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |